package practice5;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.*;
class Ticket {
    private int count =3;
    //售卖总票数
    private Lock lock=new java.util.concurrent.locks.ReentrantLock();//互斥锁
    public void sale(){         //售票业务
        this.lock.lock();           //资源锁定
        try {
            if (this.count > 0){        //有剩余票数
                TimeUnit.SECONDS.sleep(1);          //模拟操作延迟
                System.out.println("【"+Thread.currentThread().getName()+ "】卖票，剩余票数："+ this.count--);
            }else {
                System.err.println("【"+ Thread.currentThread().getName()+"】票已卖完了，明天再来！“");
            }
            }catch (Exception e) {
        }
        finally {
            this.lock.unlock();             //解除锁定
        }
    }
}
public class ReentrantLock {
    public static void main(String[]args) throws Exception{
                    Ticket ticet = new Ticket();
//对象实例化
                    for (int x = 0;x< 5; x++){
//创建售卖线程
                        new Thread(() ->{
                            ticet.sale();
//售票处理
                        }, "售票员-" + x).start();}}}